|Anime debut||Jirachi: Wish Maker|
|English voice actor||Megan Hollingshead|
|Japanese voice actor||Riko Mahise|
Diane (Japanese: ダイアン Diane) is an anime character who appeared in Jirachi: Wish Maker. She assists her childhood friend, Butler, in his magic show. Her Japanese voice actress is Riko Mahise and her English voice actress is Megan Hollingshead.
Along with Butler, Diane had a cameo during the credits of the eighth movie, and appeared in Pokémon Diamond and Pearl as a Cool Trainer on Route 229, though the reference was not caught by the English localization team.